Why does it take more than 12 hours to defrag a 120 GB hard drive??
some obvious causes may include;
- how badly fragmented is it?
- have you turned off your AV software?
- did you stop VSS?
- did you exclude restore points and hibernation file?
- what are your system resources; ram, cpu?
- did you run CC first so as not to defrag crap/temp files and to empty the recycle bin?
some other questions; 120gig is an unusual drive capacity, is it a SSD?
also try running DF from Safe Mode so no other background task come into play.